BIG-PLUS OVERVIEW
THE BIG-PLUS SPINDLE SYSTEM IS AN ORIGINAL DEVELOPMENT OF BIG DAISHOWA SEIKI CO., LTD. BIG-PLUS spindles have been adopted by licensed machine and spindle builders around the world under strictly controlled dimensions using BIG’s master gage. In order to protect the spindle or prevent possible accident, only use tool holders with the BIG-PLUS trademark. IMPROVEMENT OF ATC REPEATABILITY The BIG-PLUS Spindle System ensures the highest precision location of the tool holder in the spindle when using the ATC for loading tools as a result of the dual contact, which precisely positions the tool holder within 1 micron.
ATC Repeatability
WITHIN 1 µm
Machine: Horizontal (4 years old)
6"
10 8 6 4 2 0
Taper Contact (Conventional) Dual Contact (BIG-PLUS)
Test Bar (Zero Runout)
Pulling Force 800kg
12345678910 No. of Times of ATC
MINIMIZED DEFLECTION FOR MAXIMUM MACHINING ACCURACY & SUPERIOR FINISH BIG-PLUS simultaneous contact enhances machining rigidity with the larger contact diameter of the tool holder flange face, reducing deflection and improving accuracy and finish.
BIG-PLUS
Conventional
3
STRICT GAGE CONTROL BIG-PLUS spindles produced by the licensed machine and spindle builders are strictly controlled in dimensions by the original BIG master gage. Only BIG-PLUS trademarked tool holders can achieve the optimal performance fully and safely.
Gages for Machine Spindle
Master Arbor
Master Gage
Measuring Device
BIG-PLUS Spindle System Machine Builders The BIG-PLUS Spindle System is offered by many of the world’s leading manufacturers of machining centers. Some of the machine and spindle builders who have produced BIG-PLUS spindles are as follows: ACCUWAY, ADVANCED MACHINE , ALEX-TECH, AMS, ANCA, AONO GIKEN, ARES, ASADA SEIKI, ASA TECH, AWEA, BERG SPANNTECHNIK, BFW, BOST, BROTHER, CERI, CHEVALIER, CHUO-SEIKI, CITIZEN, COLGAR, D.S.TECHNOLOGIE, DAH LIH, DAITO, DAIYA SEIKI, DIXI, DMC, DMG MORI PRECISION BORING, DMG MORI SEIKI, DOOSAN, EGIN-HEINISCH, EGURO, EMCO, ENSHU, FADAL, ANUC, FEELER, FEMCO, FIRST, FIRST, FISCHER , FOREST-LINÉ, FPT, FRANZ KESSLER, GIDDINGS & LEWIS, GMN, GROB, GTI , HAIDE, HARDINGE, HARTFORD, HEYLIGENSTAEDT, HISION, HNK, HOMMA, HORKOS, HOWA, HSD, HST, HURCO, HWACHEON, IBAG, IBARMIA INNOVATEK, IKEGAI, INOUE KOSOKU KIKAI, JHENG TAI, JOBS, JOHNFORD, JTEKT MACHINE SYSTEMS, JTEKT, JUNGWOO M.S., JYOTI, KARATS, KASHIFUJI, KASWIN, KENTURN, KIRA, KITAMURA, KIWA, KMT, KOMATSU NTC, KONDIA, KOYO, KPTEC, LAZZATI, LMW, MAG, MAGNIX, MAKINO, MAKINO SEIKI, MANDELLI, MATSUURA, MAZAK, MCM, MECTRON, MILLTRONICS, MITSUI SEIKI, MOTOKUBO, MTE, MYL, N.S.S, NACHI, NAKAMURA, NEWAY, NICOLÀS CORREA, NIDEC MACHINE TOOL, NIDEC OKK, NIIGATA, NIPPON BEARING, NISHIJIMAX, NISSIN-MFG, NOMURA, NORTHLAND TOOL , NSK, NUMEN, O-M, OBATAKE, OHTORI, OKUMA, OMLAT, OMV, OVERMACH, PAMA, PDS , PIETRO CARNAGHI, PMC, QUASER, REIDEN, ROKU ROKU, ROYAL, RS TEC, SAJO, SEMA, SEMPUCO, SETCO , SHAN RONG, SHIBAURA, SHODA, SHW, SKF USA, SKG, SKODA, SKYNC, SMEC, SNK, SODICK, SORALUCE, SPINDER, SPINTEC, SPINTRUE, SPS , STARRAGHECKERT, STUDER, SUFENG, SUGINO, SUNWOO, SUPERIOR SPINDLE SERVICE , SWIFT, TAJMAC-ZPS, TAKAMAZ KIKAI KOUGYOU, TAKISAWA, TANABE, THETA, TONGTAI, TOS KURIM, TOS VARNSDORF, TOYO SEIKI, TSUDAKOMA, TSUGAMI, UGINT, UTSUNOMIYA, VICTOR TAICHUNG, VTEC, VYU CHENG, WALDRICH COBURG, WELE, WIA, YAMASAKI GIKEN, YAMASHINA SEIKI, YASDA, YASUNAGA, YCM, YU HUNG, ZAYER (As of September 2025)
• Bold company names are North American licensed BIG-PLUS spindle rebuilders
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